Hair-spring-stud-holding means.



W. W. DUDLEY.

HAIR SPRING STUD HOLDING MEANS.

APPLICATION TILED APR. 19, 1911.

1,037,742. Patented Sept. 3,1912.

WITNESSES W WW, 1.21:7?

COLUMBIA FLANOGRAPH 60-, WASHINGTON. D. cw

UNITED STATES PATENT OFFICE.

WILLIAM W. DUDLEY, 0F LANCASTER, PENNSYLVANIA, ASSIGNOR T0 HAMILTONWATCH COMPANY, OF LANCASTER, PENNSYLVANIA.

HAIR-SPRING-STUI)-HOLDING MEANS.

Specification of Letters Patent.

Patented Sept. 3, 1912.

To all whom it may concern:

Be it known that I, IVILLIAM W. DUDLEY, of Lancaster, in the county ofLancaster, and in the State of Pennsylvania, have invented a certain newand useful Improvement in Hair-Spring-Stud-Holding Means, and do herebydeclare that the following is a full, clear, and exact descriptionthereof.

My invention relates to means for attaching the outer end of hair orbalance springs of Watches and other time pieces to the balance cock,and the object of my invention is to provide improved means for thispurpose which without any loss of elliciency will possess the importantcharacteristics of simplicity, adjustability for leveling the spring andsaving of time in manipulation, both in the factory and in the watchrepairers shop, and to this end my invention consists in theconstruction and arrangement of parts substantially as hereinafterspecified and claimed.

Referring to the accompanying drawingS Figure l is a perspective view ofenough of a watch movement to illustrate an embodiment of my invention,the stud clamping plate being shown in dotted lines in positionpermitting the insertion and removal of the stud; and Fig. 2 is a detailview in perspective of the cap and a portion of the balance cockseparated.

In the embodiment of my invention illustrated in the drawings, thebalance cock 10 is of ordinary construction having in one side near itsfree end, as usual, a notch 11 for the reception of the hair spring stud12 which as shown is triangular 1n cross section and the notch iscorrespondingly V-shaped. Crossing the open side of the notch andengaging the outer side of the hair spring stud is a cap 13 in the formof a light, flat oblong plate. Passing through holes on opposite sidesof the notch, and entering the threaded or tapped holes in the side ofthe balance cock are two screws 14. The hole in the cap through whichone of the screws passes is closed on all sides while a slot 15 extendsfrom the other hole to one side of the cap so that merely by looseningthe screws the cap can be swung on one of the screws as upon a pivot tocover or uncover the stud and its notch, and thus without the removal ofany of the parts, including the screws, the removal and replacing of theOoplen of this patent may be obtained for five cents each,

1111' spring stud can be effected. The advantage of voiding thenecessity for the removal of any of these delicate and small parts willbe evident to those skilled in the art in the matter of avoiding theloss or displacement of the parts as well as in saving time.

The operation of leveling the spring is greatly facilitated where myinvention is used. By the use of the two screws there is no likelihoodwhatever of deranging or changing the vertical adjustment of the stud byany movement of the cap that might be caused from the friction of thescrew head either in loosening 0r tightening the cap as is the case withsuch a construction as has heretofore been used wherein but a singleholding screw is used.

Having thus described my invention what I claim is- 1. In a device ofthe class described, the combination of a balance cook, a hair springstud, a cap overlying the hair spring stud, a pivotal connection betweenthe cap and the balance cock on which the cap swings in a plane parallelwith the axis of the balance wheel staff, and a screw passing through alaterally elongated opening or slot in the cap and into the side of thebalance cock.

2. In a device of the class described, the combination of a balancecook, a hair spring stud and a cap overlying the hair spring stud, thecock having a stud-receiving notch in one side, the cap extending acrossthe open side of the notch, the cap and stud having surfaces in contactthat lie in the same plane, and screws passing through said cap into theside of the balance cock on opvosite sides of the notch, the cap beingprovided with holes for the passage of said screws, one of said screwsand its hole forming a pivotal connection between the cap and thebalance cock on which the cap ma swing in a direction parallel with thebalance staff, and one of said holes being eX- tended to one side of thecap and opening thereat.

In testimony that I claim the foregoing I have hereunto set my hand.

WVILLIAM WV. DUDLEY.

WVitnesses:

RUSSELL H. DUDLEY, CHAs. J. WVILLIAMsoN.

Washington, D. 0.

